source: mainline/uspace/drv/char/xtkbd/xtkbd.c@ 1a0fa29c

/*
 * Copyright (c) 2011 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/** @addtogroup drvkbd
 * @{
 */
/** @file
 * @brief XT keyboard driver;
 */

#include <errno.h>
#include <ddf/log.h>
#include <io/keycode.h>
#include <io/console.h>
#include <ipc/kbdev.h>
#include <abi/ipc/methods.h>

#include "chardev.h"
#include "xtkbd.h"

/** Scancode set 1 table. */
static const int scanmap_simple[] = {

        [0x29] = KC_BACKTICK,

        [0x02] = KC_1,
        [0x03] = KC_2,
        [0x04] = KC_3,
        [0x05] = KC_4,
        [0x06] = KC_5,
        [0x07] = KC_6,
        [0x08] = KC_7,
        [0x09] = KC_8,
        [0x0a] = KC_9,
        [0x0b] = KC_0,

        [0x0c] = KC_MINUS,
        [0x0d] = KC_EQUALS,
        [0x0e] = KC_BACKSPACE,

        [0x0f] = KC_TAB,

        [0x10] = KC_Q,
        [0x11] = KC_W,
        [0x12] = KC_E,
        [0x13] = KC_R,
        [0x14] = KC_T,
        [0x15] = KC_Y,
        [0x16] = KC_U,
        [0x17] = KC_I,
        [0x18] = KC_O,
        [0x19] = KC_P,

        [0x1a] = KC_LBRACKET,
        [0x1b] = KC_RBRACKET,

        [0x3a] = KC_CAPS_LOCK,

        [0x1e] = KC_A,
        [0x1f] = KC_S,
        [0x20] = KC_D,
        [0x21] = KC_F,
        [0x22] = KC_G,
        [0x23] = KC_H,
        [0x24] = KC_J,
        [0x25] = KC_K,
        [0x26] = KC_L,

        [0x27] = KC_SEMICOLON,
        [0x28] = KC_QUOTE,
        [0x2b] = KC_BACKSLASH,

        [0x2a] = KC_LSHIFT,

        [0x2c] = KC_Z,
        [0x2d] = KC_X,
        [0x2e] = KC_C,
        [0x2f] = KC_V,
        [0x30] = KC_B,
        [0x31] = KC_N,
        [0x32] = KC_M,

        [0x33] = KC_COMMA,
        [0x34] = KC_PERIOD,
        [0x35] = KC_SLASH,

        [0x36] = KC_RSHIFT,

        [0x1d] = KC_LCTRL,
        [0x38] = KC_LALT,
        [0x39] = KC_SPACE,

        [0x01] = KC_ESCAPE,

        [0x3b] = KC_F1,
        [0x3c] = KC_F2,
        [0x3d] = KC_F3,
        [0x3e] = KC_F4,
        [0x3f] = KC_F5,
        [0x40] = KC_F6,
        [0x41] = KC_F7,

        [0x42] = KC_F8,
        [0x43] = KC_F9,
        [0x44] = KC_F10,

        [0x57] = KC_F11,
        [0x58] = KC_F12,

        [0x46] = KC_SCROLL_LOCK,

        [0x1c] = KC_ENTER,

        [0x45] = KC_NUM_LOCK,
        [0x37] = KC_NTIMES,
        [0x4a] = KC_NMINUS,
        [0x4e] = KC_NPLUS,
        [0x47] = KC_N7,
        [0x48] = KC_N8,
        [0x49] = KC_N9,
        [0x4b] = KC_N4,
        [0x4c] = KC_N5,
        [0x4d] = KC_N6,
        [0x4f] = KC_N1,
        [0x50] = KC_N2,
        [0x51] = KC_N3,
        [0x52] = KC_N0,
        [0x53] = KC_NPERIOD
};

#define KBD_ACK   0xfa
#define KBD_RESEND   0xfe
#define KBD_SCANCODE_SET_EXTENDED   0xe0
/** Scancode set 1 extended codes table */
static const int scanmap_e0[] = {
        [0x38] = KC_RALT,
        [0x1d] = KC_RSHIFT,

        [0x37] = KC_PRTSCR,

        [0x52] = KC_INSERT,
        [0x47] = KC_HOME,
        [0x49] = KC_PAGE_UP,

        [0x53] = KC_DELETE,
        [0x4f] = KC_END,
        [0x51] = KC_PAGE_DOWN,

        [0x48] = KC_UP,
        [0x4b] = KC_LEFT,
        [0x50] = KC_DOWN,
        [0x4d] = KC_RIGHT,

        [0x35] = KC_NSLASH,
        [0x1c] = KC_NENTER
};

#define KBD_CMD_SET_LEDS 0xed
enum led_indicators {
        LI_SCROLL       = 0x01,
        LI_NUM          = 0x02,
        LI_CAPS         = 0x04,
};

static int polling(void *);
static void default_connection_handler(ddf_fun_t *, ipc_callid_t, ipc_call_t *);

/** Keyboard function ops. */
static ddf_dev_ops_t kbd_ops = {
        .default_handler = default_connection_handler
};

/** Initialize keyboard driver structure.
 * @param kbd Keyboard driver structure to initialize.
 * @param dev DDF device structure.
 *
 * Connects to parent, creates mouse function, starts polling fibril.
 */
int xt_kbd_init(xt_kbd_t *kbd, ddf_dev_t *dev)
{
        assert(kbd);
        assert(dev);
        kbd->client_sess = NULL;
        kbd->parent_sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
        if (!kbd->parent_sess)
                return ENOMEM;

        kbd->kbd_fun = ddf_fun_create(dev, fun_exposed, "kbd");
        if (!kbd->kbd_fun) {
                return ENOMEM;
        }
        ddf_fun_set_ops(kbd->kbd_fun, &kbd_ops);

        int ret = ddf_fun_bind(kbd->kbd_fun);
        if (ret != EOK) {
                ddf_fun_destroy(kbd->kbd_fun);
                return ENOMEM;
        }

        ret = ddf_fun_add_to_category(kbd->kbd_fun, "keyboard");
        if (ret != EOK) {
                ddf_fun_unbind(kbd->kbd_fun);
                ddf_fun_destroy(kbd->kbd_fun);
                return ENOMEM;
        }

        kbd->polling_fibril = fibril_create(polling, kbd);
        if (!kbd->polling_fibril) {
                ddf_fun_unbind(kbd->kbd_fun);
                ddf_fun_destroy(kbd->kbd_fun);
                return ENOMEM;
        }
        fibril_add_ready(kbd->polling_fibril);
        return EOK;
}

/** Get data and parse scancodes.
 * @param arg Pointer to xt_kbd_t structure.
 * @return Never.
 */
int polling(void *arg)
{
        assert(arg);
        const xt_kbd_t *kbd = arg;

        assert(kbd->parent_sess);
        async_exch_t *parent_exch = async_exchange_begin(kbd->parent_sess);
        while (1) {
                if (!parent_exch)
                        parent_exch = async_exchange_begin(kbd->parent_sess);

                const int *map = scanmap_simple;
                size_t map_size = sizeof(scanmap_simple) / sizeof(int);

                uint8_t code = 0;
                ssize_t size = chardev_read(parent_exch, &code, 1);

                /** Ignore AT command reply */
                if (code == KBD_ACK || code == KBD_RESEND) {
                        continue;
                }

                if (code == KBD_SCANCODE_SET_EXTENDED) {
                        map = scanmap_e0;
                        map_size = sizeof(scanmap_e0) / sizeof(int);
                        size = chardev_read(parent_exch, &code, 1);
                        // TODO handle print screen
                }

                /* Invalid read. */
                if (size != 1) {
                        continue;
                }


                /* Bit 7 indicates press/release */
                const kbd_event_type_t type =
                    (code & 0x80) ? KEY_RELEASE : KEY_PRESS;
                code &= ~0x80;

                const unsigned key = (code < map_size) ? map[code] : 0;
                if (key != 0) {
                        async_exch_t *exch =
                            async_exchange_begin(kbd->client_sess);
                        if (!exch) {
                                ddf_msg(LVL_ERROR,
                                    "Failed creating exchange.");
                                continue;
                        }
                        async_msg_4(exch, KBDEV_EVENT, type, key, 0, 0);
                        async_exchange_end(exch);
                } else {
                        ddf_msg(LVL_WARN, "Unknown scancode: %hhx", code);
                }
        }
}

/** Default handler for IPC methods not handled by DDF.
 *
 * @param fun Device function handling the call.
 * @param icallid Call id.
 * @param icall Call data.
 */
void default_connection_handler(ddf_fun_t *fun,
    ipc_callid_t icallid, ipc_call_t *icall)
{
        const sysarg_t method = IPC_GET_IMETHOD(*icall);
        xt_kbd_t *kbd = ddf_dev_data_get(ddf_fun_get_dev(fun));

        switch (method) {
        case KBDEV_SET_IND: {
                /* XT keyboards do not support setting mods,
                 * assume AT keyboard with Scan Code Set 1 */
                const unsigned mods = IPC_GET_ARG1(*icall);
                const uint8_t status = 0 |
                    ((mods & KM_CAPS_LOCK) ? LI_CAPS : 0) |
                    ((mods & KM_NUM_LOCK) ? LI_NUM : 0) |
                    ((mods & KM_SCROLL_LOCK) ? LI_SCROLL : 0);
                uint8_t cmds[] = { KBD_CMD_SET_LEDS, status };
                async_exch_t *exch = async_exchange_begin(kbd->parent_sess);
                const ssize_t size = chardev_write(exch, cmds, sizeof(cmds));
                async_exchange_end(exch);
                async_answer_0(icallid, size < 0 ? size : EOK);
                break;
        }
        /* This might be ugly but async_callback_receive_start makes no
         * difference for incorrect call and malloc failure. */
        case IPC_M_CONNECT_TO_ME: {
                async_sess_t *sess =
                    async_callback_receive_start(EXCHANGE_SERIALIZE, icall);
                /* Probably ENOMEM error, try again. */
                if (sess == NULL) {
                        ddf_msg(LVL_WARN,
                            "Failed creating callback session");
                        async_answer_0(icallid, EAGAIN);
                        break;
                }
                if (kbd->client_sess == NULL) {
                        kbd->client_sess = sess;
                        ddf_msg(LVL_DEBUG, "Set client session");
                        async_answer_0(icallid, EOK);
                } else {
                        ddf_msg(LVL_ERROR, "Client session already set");
                        async_answer_0(icallid, ELIMIT);
                }
                break;
        }
        default:
                        ddf_msg(LVL_ERROR, "Unknown method: %d.", (int)method);
                        async_answer_0(icallid, EINVAL);
                        break;
        }
}